12203321561 has 8 divisors (see below), whose sum is σ = 12279960000. Its totient is φ = 12126906000.

The previous prime is 12203321551. The next prime is 12203321567. The reversal of 12203321561 is 16512330221.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12203321561 - 2¹⁰ = 12203320537 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 12203321561.

It is not an unprimeable number, because it can be changed into a prime (12203321567) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 54815 + ... + 165563.

It is an arithmetic number, because the mean of its divisors is an integer number (1534995000).

Almost surely, 2^12203321561 is an apocalyptic number.

It is an amenable number.

12203321561 is a deficient number, since it is larger than the sum of its proper divisors (76638439).

12203321561 is a wasteful number, since it uses less digits than its factorization.

12203321561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111439.

The product of its (nonzero) digits is 2160, while the sum is 26.

Adding to 12203321561 its reverse (16512330221), we get a palindrome (28715651782).

The spelling of 12203321561 in words is "twelve billion, two hundred three million, three hundred twenty-one thousand, five hundred sixty-one".